Just picked up an 01 Passat 4motion wagon with the 30 value V6 engine in it. The PO inherited this car and seems like he drove it until it wouldn't go anymore and then sold it. I picked it up, thinking that I can fix most of its problems, but I am new to this engine and model year, and could use some advise (I am familiar with other VWs, mostly the older B4 and A4 TDI's).
The two most serious problems with the engine are: battery is not being charged, and pretty severe oil leaks. I've read up some on the oil leaks here, and it sounds like a classic PVC and gasket repair. I may have more questions on that in the future, but the first thing that needs attention is the lack of charging to the battery (since it won't go much further than a few miles as is now before the battery starts getting low).
I've put a charger to the battery, and it charges up and holds a charge well. When I start the engine, the voltage at the battery terminals is low (12-13v) and does not go up if the engine is rev'd up to 3000+RPM. In fact rev'ing the engine seems to make no diff to the battery voltage. Voltage constantly drops as the engine is run, and goes down much faster if the lights are on. The serp belt is old but decent, with no obvious signs of oil on it, and appears to be turning the alternator. I want to check to see if the Alt fuse (or fusible link) is shot, but the wiring on this car is a mystery to me. I am working on getting the Bentley for this model/year, but until then, could someone tell me where the applicable fuses are which might interfere with the alternator getting its juice to the battery? Are they fuse box fuses, fusible links and where are they hidden?
Anything else I should check before I pull the alt and have it checked at a shop?